Exercise step box



FIG. 1 is a front elevation view of an exercise step box;

FIG. 2 is a rear elevation view thereof;

FIG. 3 is a left elevation view thereof;

FIG. 4 is a right elevation view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a top perspective view thereof; and,

FIG. 8 is a bottom perspective view thereof.

The broken line portion of the figures is included to show unclaimedsubject matter only and forms no part of the claimed design.

CLAIM The ornamental design for an exercise step box, as shown anddescribed.